Weft replenishing double shuttle loom



June 2,' 1931. R TURNER 1,807,764

WEFT REPLENISHING DOUBLE SHUTTLE LOO]! Filed Jan. 14, 1930 a y y far? /Q V fidd/d Patented June 2, 1931 UNETED STATES PATENT OFFICE RICHARD G. TURNER, OF WORGESTER, MASSACHUSETTS, ASSIG-NOR TO CROM PTON & KNOWLES LOOM WORKS, 0F WORCESTER, IQASSACHUSETTS, A. CORPORATION OF MASSACHUSETTS WEFT REPLENISHING DOUBLE SHUTTLE LOOMv Application filed January 14, 1930.

my invention to provide a simplified connection between the weft detector and the transfer controlling mechanism.

In the loom to which my invention more particularly relates provision is made for communicating the indication from the detector to the transfer arm in two steps, the first step effecting the setting of a control lever by the detector to cooperate with the shuttle feeler, and the second step acting through the lay and moving said lever to place the transferrer in active position if the shuttle be present. This second movement of the lever is in the same direction as the first and it is desirable to permit yielding of the connections between said lever and the weft detector so that the latter may be relieved of strains when the lever has its secondary motion. It is the further object of my present invention to give the lever its initial setting by a force transmitted through an element which will yield to permit the secondary movement of said lever. By this construction I am able to simplify the form of lever heretofore employed.

With these general objects in view which will appear as the description proceeds, my invention resides in the combination and ar rangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a front elevation of a loom having my invention applied thereto.

Fig. 2 is a top plan view of the structure shown in Fig. 1.

Fig. 3 is a detail top plan view taken on line 33 of Fig. 1, and

Figs. 4 and 5 are diagrammatic views showing the lever in its initial and secondary positions, respectively.

Referring to Figs. 1 and 2 I have shown a loom lay 10 having a shuttle box 11 pro vided with a front wall 12. The wall is open to expose the fronts of the upper and lower Serial No. 420,763.

shuttles, one of the shuttles being indicated at S in Fig. 2. Two transfer slides 13 are mounted to move back and forth in guides 14 against the action of tension springs 15 connected to the slide and the loom frame. A stud 16 on each slide has connection with the left end of a driving lever 17 pivoted as at 18 to the breastbeam 19 of the loom. Each driving lever is provided with an engaging knife edge 20 normally out of the path of its corresponding transfer hook 21. The hooks are mounted on an upstanding transfer lever 22 driven by means not shown to have a regularly recurring backward movement preferably on each alternate beat-up of the lay when both shuttles are on that side of the loom adjacent to the transfer slide.

A magazine 23 supports weft bobbins 24 which are positioned for engagement with one or another of the slides 13. It is to be under stood that there are two slides to effect transfer and that the bobbins are positioned by the magazine so that they may be moved horizontally from the magazine into the shuttles. To permit this operation the shuttles run on their sides so that the slot therethrough is horizontal.

Each shuttle cooperates with a shuttle feeler 25 pivoted on a vertical axis 26 fixed with respect to the lay and limited as to coun ter clockwise movement, as viewed in Fig. 2, by stop screw 27. The opposite side of each lever is provided with a shuttle engaging screw 23 which performs the shuttle feeling operation. There will be one shuttle feeler for each transfer mechanism and each feeler will be provided with an actuator stud or pin 29.

Extending from the opposite side of the loom are two flexible connectors or chains 30 and 31, respectively, which are controlled by the feelers not shown located on the opposite side of the loom. There will be one feeler for each shuttle and when exhaustion occurs in either shuttle its corresponding chain will move to the right, as viewed in Fig. 1. In order to accomplish this motion I attach the connectors 30 and 31 to detector levers 32 and 33, respectively, pivoted on a horizontal stud 34. Each of said levers is provided with a pull spring 35, the left end of which is screwed to a fixed clip 36, as shown in Fig. 3. The springs 35 act to hold the chains connected thereto taut, so that when either chain is released from the opposite side of the loom the corresponding lever 32 or 33 will have a left hand movement.

The matter thus far described may be substantially the same as that heretofore used and forms no part of my present invention.

In carrying my present invention into effect I provide the breastbeam with a vertical pivot l and mount t ereon upper and lower controlling levers a l and 4-2, respectively. Each of the latter is provided with an inclined u, fee -13 ad pted for engagei'nent with the corresponding actuator stud or pin 29. The face 1-3 may be carried by an arm 44: which i. adjustably secured to arm e forming lart of :ch control love. The forward part of each or said controlling levers has attached thereto a push rod or lever 46 to have engagement with the corresponding hook 21.

interposed between the upper part of forward detector lever 32 ant, the lower control lever d2 is a closely wound coiled spring 4-7, and a similar spring 48 connects the rear de tector lever 33 with the upper control lever 41.

During normal ope 'ation of the loom the hooks 21 will be outof the path of the projections of the driving levers 17 so that the latter and the co responding slide 13 will remain at rest as the transfer leve s move rearwardly. Under these conditions the connectors or chains and 31 will remain in their normal position to the left. When ex haustion occurs in the upper shuttle, for instance, the weft detector corresponding thereto will release chain 31 so that the spring 35 attached to the lever 33 will rock the latter in a counter clockwise direction, moving the tightly wound spring 48 to the left. This will give top control lever ll its initial movement to place surface 43 thereof in the path of the advancing corresponding pin 29. This action takes place during the forward movement of the lay, and as the latter continues to advance the pin 29 will engage the surface 43 to rock the lever 4L1 in a clockwise direction, thereby giving the control lever its secondary or final movement around the vertical pivot 40. T his will result in a movement of the corresponding push rod 46 into engagement with the upper hook 21 to move the latter in front of its projection 20. As the hook moves rearwardly the transfer lever and its corresponding slide will move toward the lay to effect trans for in known manner.

This action of transfer is dependent upon the presence of the depleted shuttle in its box on the magazine side of the loom, for if the shuttle is not properly boxed the feeler screw 28 will move through the front box plate 12 and the pin 29 will not be fixed but will rock with the attached lever 25 during advance of the lay without rocking the control lever. The hook will therefore remain at rest and the secondary oscillation of the lever Q2 and transfer will not occur.

From the foregoing it will be seen that I have provided a simple connection between the detector levers and the control levers which are sufficiently stiff to give the control levers their initial movements to place the inclined surfaces 4-3 in the path of the advancing studs 29, but being sufficiently resilient to permit continued oscillation of the control levers without requiring additional movement on the part of the detectorlevers. While I have shown the springs l? as being closely wound, yet I do not wish to be limited in this construction, as any form of connection between the detector and control levers which will yield during the secondary movement of the control levers but be sufficiently stiff to cause the initial movement of said levers will suflice.

There are other ways in which the transfer arm may transfer a bobbin and I do not wish to be limited to the one disclosed herein.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a double shuttle weft replenishing loom, a weft detector controlled member movable from non-indicating to indicating position at weft exhaustion, transfer mechanism, a controller therefor, a regularly moving element to have operative relation with the controller, and a connection between the member and controller to move the latter into engaging position relatively to the element when the member moves to indicating position, the element to thereafter move the controller into operative position relative to the transfer mechanism to initiate transfer, the connection yielding the controller has the latter movement while the member remains in indicating position.

2. In a double shuttle weft replenishing loom, a weft detector controlled member movable from non-indicating to indicating position, transfer mechanism, a regularly moving element, a controller to communicate force from the element to the transfer mechanism and normally out of engaging position relatively to the element, and a connector between the member and the controller to more the latter into operative relation with the ment when the member moves to indicating position, said connection to yield after the element engages the controller in order that the member may remain in indicating position as the controller transmits force to the transfer mechanism.

3. In a double shuttle weft replenishing loom, a weft detector controlled member movable from non-indicating to indicating position, transfer mechanism, a regularly moving element, a controller to communicate force from the element to the transfer mechanism and normally out of engaging position relatively to the element, and a connector between the member and the controller, said connector being capable of transmitting force in compression and yieldable when subjected to tension, the connector acting to give the controller an initial movement when the member moves to indicating position to place the controller in operative relation with respect to the element, and said connector under tension during a secondary movement and exerting a force to the transfer mechanism which is opposed to the force which the controller receives from the element.

4. In a double shuttle weft replenishing loom, a weft detector controlled member movable from nonindicating to indicating position, transfer mechanism, a regularly moving element, a controller to communicate force 1' from the element to the transfer mechanism and normally out of engaging position relatively to the element, and a coil spring interposed between the member and the controller and efiective to transmit a force in compression to give the controller an initial movement when the member moves to indicating position to place the controller operatively with respect to the element, and said spring yielding in tension when the controller is given a secondary movement by the element to transmit force from the latter to the transfer mechanism.

5. In a double shuttle weft replenishing loom, a weft detector controlled member movable from non-indicating to indicating position, transfer mechanism, a regularly moving element, a controller to communicate force from the element to the transfer mechanism and normally out of engaging position relatively to the element, and a coiled spring having the coils thereof normally in close engagement with each other, said spring connecting the member and controller and transmitting a force in compression to the controller to givethe latter an initial movement when the member moves to indicating position to place the controller operatively with respect to the element, and said spring subsequently expanding as the member remains in indicating position and while the controller is given a secondary movement by the element to transmit force from the latter to the transfer mechanism.

In testimony whereof I have hereunto affixed my signature.

RICHARD G. TURNER. 

